Manufacture of high speed steels



Patented Feb. ,4, 1941 UNITED STATES PATENT oFFlcE MANUFACTURE OF HIGH SPEED STEELS Eduard Houdremont and Hans Schrader, Essen, Germany, assignors, by mesne assignments, to Pantena Limited, Glarus, Switzerland, a corporation of Switzerland 2 Claims.

contain from 1.0 to 1.6% carbon, from 1.0 to 6.0%

chromium, more than 1.0% and less than 5.0% molybdenum, from 2.0 to 6.0% vanadium and up to 5% cobalt, the remainder substantially all being iron with the normal impurities.

Steels of a composition as specified hereinbefore although they contain only small percentages of alloying constituents are distinguished by a high efliciency in the chip-removing working of materials and can be equal in this respect even to the known high alloy high speed tungsten steels or, under favorable cutting conditions, even be superior to them.

The ratio of efilciency to degree of alloying is most favorable with steels according to the invention, which besides iron with the normal impurities contain from 1.2 to 1.5% carbon, from 3.0 to 5.0% chromium, at least 3.0% and less 5.0 molybdenum, from 4.0 to 6.0% vanadium and up to 5% cobalt. V

What we claim and desire to secure by Letters Patent is:

-1. A high speed steel consisting of 1.0 to 1.6% carbon, 1.0 to 6.0% chromium, more than 1.0% and less than 5.0% molybdenum, 2.0 to 6.0% vanadium and from 0.2 to 5% cobalt, remainder substantially all iron with the normal impurities.

2. A high speed steel consisting of 1.2 to 1.5% carbon, 3.0 to 5.0% chromium, at least 3.0% and less than 5% molybdenum, 4.0 to 6.0% vanadium and from 0.2 to 5% cobalt, remainder substantially all iron with the normal impurities.

EDUARD HOUDREMONT. HANS 

